Charts Render Double-counted Data

Question

I'm trying to create a dashboard using data from 2 csv files. The csv are exactly the same except for two of the columns (score and total) contain different values. Because of dc.js limitations, I had to aggregate them. However, when rendering the charts, the counts were doubled (one for each csv). My csv looks similar to this:

"data1.csv"

agegroup    gender  group   scores  total
  18-24       M      1       0.04    1
  45-54       F      2       2.23    13
  25-34       M      1       0.74    6
  25-34       M      2       1.47    8
  18-24       F      1       2.88    7
  35-44       F      2       3.98    14

"data2.csv"

 agegroup   gender  group   scores  total
  45-54       F      1       4.93    8
  35-44       M      2       1.13    4
  18-24       M      1       5.28    9
  25-34       M      2       1.95    20
  18-24       F      1       0.52    18

Ideally what I would like is to still make a dashboard that could sum up the totals and scores depending on if I select data1.csv or data2.csv, but if I were to select both, it wouldn't sum up my total and scores column twice.

//using queue.js to load data
var q = queue()
  .defer(d3.csv, "data1.csv")
  .defer(d3.csv, "data2.csv");

  q.await(function(error, data1, data2){

  //initiatizing crossfilter and ingesting data
  var ndx = crossfilter();
  ndx.add(data1.map(function(d){
    return { age: d.age,
             gender: d.gender,
             scores: +d.scores,
             total: +d.total,
             type: 'data1'};
    }));

  ndx.add(data2.map(function(d){
    return { age: d.age,
             gender: d.gender,
             scores: +d.scores,
             total: +d.total,
             type: 'data2'};
    }));

//initializing charts
totalDisplay = dc.numberDisplay("#total-display");
totalScores = dc.numberDisplay("#total-scores");

//groupAll function to sum up the values. 
var scoresGroup = ndx.groupAll().reduceSum(function(d) {
          return d.scores;
        });
        var totalGroup = ndx.groupAll().reduceSum(function(d) { 
          return d.total;
        });

//parameters for the number display. Currently it is returning NaN
totalDisplay
        .formatNumber(d3.format(","))
        .valueAccessor(function(d) {
            return d;
        })
        .group(totalGroup);

totalScores
        .formatNumber(d3.format(",f"))
        .valueAccessor(function(d) {
            return d;
        })
        .group(scoresGroup);